https://github.com/mitsuhiko/pipsi/issues/100

install_pipsi.sh

#!/usr/bin/env bash

# https://github.com/mitsuhiko/pipsi

BOOTSTRAP_DIR=~/.local/venvs/__bootstrap
BOOTSTRAP_PKGS=$(cat <<EOF
virtualenv
EOF
)

CMD=pipsi
VENV_DIR=~/.local/venvs/pipsi
BIN_DIR=~/.local/bin
PACKAGES=$(cat <<EOF
-e git+https://github.com/mitsuhiko/pipsi.git#egg=pipsi
EOF
)

set -e

(
    echo 'Create the bootstrapping virtualenv w/ python 3'"'"'s `venv`'
    set -x
    /usr/bin/env python -m venv "${BOOTSTRAP_DIR}"
    
)
(
    echo 'Activate bootstrapping virtualenv'
    cd "${BOOTSTRAP_DIR}/bin/"
    source ./activate  # sourced with path prefix for pyenv compatibility

    set -x
    
    echo 'Install `virtualenv` into bootstrapping virtualenv'
    "${BOOTSTRAP_DIR}/bin/pip" install -U pip
    "${BOOTSTRAP_DIR}/bin/pip" install ${BOOTSTRAP_PKGS}

    echo 'Create pipsi virtualenv w/ `virtualenv`'
    virtualenv --python=python3 "${VENV_DIR}"
)
(
    echo 'Activate pipsi virtualenv'
    cd "${VENV_DIR}/bin/"
    source ./activate

    set -x
    
    echo 'Install `pipsi` and `virtualenv`'
    "${VENV_DIR}/bin/pip" install -U pip
    "${VENV_DIR}/bin/pip" install ${BOOTSTRAP_PKGS}
    "${VENV_DIR}/bin/pip" install ${PACKAGES}

    mkdir -p "${BIN_DIR}"
    ln -s "${VENV_DIR}/bin/${CMD}" "${BIN_DIR}/"
)
(
    set -x
    echo 'Clean up bootstrapping virtualenv'
    rm -rf "${BOOTSTRAP_DIR}"
)

${CMD} --version